Improvement in plows



Plows.

.910,116,048J i v Paientedlunezonan.

UNITED STATES MARTIN L. eIEBs, 0E cANToN, oEIo.

IMPROVEMENT IN PLOWS.

Specification forming part of Letters Patent No. 116,048, dated June 20, 18,71.

that the following is a full, clear, and exact-- specification thereof.

.Nature and Objects of my Invention.)

My invention relates to an improved manner of securing the colter on the plow, and to an improved construction for facilitating the adjustment of the colter; and the first part of my invention consists in the combination, with the plo w-colter, of a colter-head, secured on the under side of the plo w-beam, and formed to receive the upper end of the colter, and of a teusion-bolt arranged between the colter .and standard, and serving to hold the colter in the colter-head and on the share-point, by which means I secure the colter .firmly on the plow without the necessity of mortising and thus weakening the beam, and also Ieffect a saving in the length of the colter, and make the plow of a more neat and linished appearance. The second part of my invention consists inthe arrangement of the plow-colter in a flaring seat in the colter-head or plow-beam, and between set-screws arranged in the colter-head or beam, and bearing upon the opposite sides and near the front edge of said colter, which arrangement aifords avery convenient means of throwing the colter into or out of land, in order to change the width of furrow to suit different teams or diiferent kinds of soil. The third part of my invention consists in the combination of a rear set-screw or .pitch-screw with the colter-head, by means of which the pitch of the colter can be increased as thefront and under side of the colter wears away, in order to overcome the tendency which this wearing away has to cause the plow to rise up out of the furrow.v

Description of Accompanying Drawing.

Figure 1 is a side view of a plow embodying my invention taken from the mold-board side. Fig..2 is another side view of the same taken from the land-side. Fig. 3 are front, side, and rear views, and longitudinal section of colter-head.- Fig.l 4 is a diagram, showing the manner and effect ofthe lateral turning of the colter.

General Description.

' A represents the plow-beam; B, the plowstandard; G, the land-sidehandle 5 H, thelandside; and J, the share, all of which are constructed and united in an ordinary manner. The mold-board and handle connected thereto are simply indicated by dotted lines, as they have no essential connection with the construction about to be explained. The colter-head O is conveniently made of malleable cast-iron or of common cast-iron, and is of the general form shown in Fig. 3, the upper part being a flat plate and the lower part being of a U-form. The dowel-pins n n 'rn are cast on the upper side of the head (l, and fit into holes bored in the under side of the beam A, and the head is firmly held to the beam by the clampingbolt D, which has its head countersunk in the head C, as shown in section in Fig. 3, and which passes up through a hole in the beam A, where it is secured by a nut and washer, as shown in Figs. l and 2. rlhe colter E has a notch, h f, cut in its lower end, as shown in Figs. l and 2, so that it sets over the share J in such a manner as to bring the center of its lower end i nearly over the share-point, as shown. The lower end of the colter is held against lateral movement by a teat on the point of the share J, which fits in a hole in the front of the notch hf, as is more fully shown in Letters Patent of the United States granted to me October 25, 1870, for improvement in plows. The upper end of the colter E lits in the U-shaped part of the head C, and the colter is firmly held in said head and on the share J by the tension-bolt F, which is connected by an eye, d, with the eye-piece c secured in the colter E, and which passes through the standard B, and is held by a nut, e, on the rear side of said standard, as shown. The side set-screws b b are inserted in holes in the sides of the head C, and press against the sides and near the front edge of the colter E, and the rear setscrew a is inserted in a hole in the back of the head C, and presses against the upper end and rear edge of the colter. The lower U-shaped part of the headB is made a little wider at the mouth than at the back, and the back of the colter E is made to lit in the back of this head (l, so that by loosening one screw, b, and turning up the other, the colter E can be turned around an axis, as represented by the line .s s, drawn from the upper and rear corner of the colter E through the point of the share J, by which means the point kof the col terE can be brought nearer to or further from the land line X X, as represented in Fig. 4, which is technically called throwing the colter into or out of land, and the object of which is to cause the plow to out a greater or lesser width of furrow, as may be found desirable in plowing with diierent teams, or in different kinds of land.

The old method of throwing the colter into or out of land was by twisting the body of the colter, which usually made it necessary for the farmer to remove the colter from the plow and take it to a blacksmith to have such twist made, which involved a loss of time and was an uncertain method of obtaining any required change of land; whereas, by the use of the set-screws b b, he can easily change the angular position of the colter in the eld at any time with the greatest precision.

In working the plow, the lower end of the colter E is liable to be worn off obliquely, as indicated by the dotted line t t, and when worn oft' in this manner the tendency is for the plow to draw out of the ground on the line t t, and thus not to take a proper depth of furrow. To overcome this difficulty, with my improved construction the farmer simply loosens the nut on the tension-bolt F, and turns the set-screw a forward, which, as is readily seen, throws the upper end of the colter forward, and brings the point k of the colter down into line with the bottom of the land-side.

It is evident that the set-screws I) b can be adapted to the ordinary construction of plows in which the colter is passed through a mortise in the beam, as by widening the front end of the mortise and inserting the screws through the side of the beam, the angular position of the colter could be changed as desired. Where the angular change of position in the colter is not required, the U-shaped part of the head C could be made to t up to the sides of the colter E, so as to dispense with the screws b b, and the flexible fastening d c for the tension-bolt F could be dispensed with 5 and where such joint is required it can be formed without the eye c by making a hole in the colter for the eye dof the bolt F, as is readily seen.

The object of the dowel-pins n n m on the head C is to prevent any movement of said head on the beam, and I consider these pins as the simplest means of eecting this result;

but the same result might be attained by cut ting a seat for the head in the beam, or by using two clamping-bolts.

Claims.

Having thus fully described my invention, what I claim therein as new and of my invention, and desire to secure by Letters Patent,

l. The colter-head C and tension-bolt F, in combination with the colter E, plow-beam A, and standard B, the several parts being arranged as and for the purpose specified.

2. The arrangement ofthe colter E in a ilaring seat in the colter-head C or beam A, and between the side set-screws b b, arranged as described, as and for the purpose specified.

3. The combination of the pitch-screw a, colter-head C, colter E, and tension-bolt F, the severa-l parts being arranged in the manner and for the purpose speci fied.

As evidence of the foregoing witness my hand this 2d day of November, A. D. 1870.

MARTIN L. GIBBS.

Witnesses:

JOB ABBOTT, ANDREW CHorFrN. 

